./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 46079a7f9ccd5156b224e35207d03a9ecc6f7ef0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 46079a7f9ccd5156b224e35207d03a9ecc6f7ef0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-12 23:59:21,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-12 23:59:21,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-12 23:59:21,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-12 23:59:21,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-12 23:59:21,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-12 23:59:21,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-12 23:59:21,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-12 23:59:21,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-12 23:59:21,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-12 23:59:21,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-12 23:59:21,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-12 23:59:21,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-12 23:59:21,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-12 23:59:21,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-12 23:59:21,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-12 23:59:21,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-12 23:59:21,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-12 23:59:21,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-12 23:59:21,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-12 23:59:21,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-12 23:59:21,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-12 23:59:21,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-12 23:59:21,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-12 23:59:21,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-12 23:59:21,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-12 23:59:21,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-12 23:59:21,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-12 23:59:21,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-12 23:59:21,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-12 23:59:21,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-12 23:59:21,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-12 23:59:21,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-12 23:59:21,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-12 23:59:21,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-12 23:59:21,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-12 23:59:21,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-12 23:59:21,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-12 23:59:21,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-12 23:59:21,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-12 23:59:21,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-12 23:59:21,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-12 23:59:21,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-12 23:59:21,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-12 23:59:21,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-12 23:59:21,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-12 23:59:21,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-12 23:59:21,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-12 23:59:21,462 INFO L138 SettingsManager]: * Use SBE=true [2021-10-12 23:59:21,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-12 23:59:21,463 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-12 23:59:21,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-12 23:59:21,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-12 23:59:21,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-12 23:59:21,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-12 23:59:21,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-12 23:59:21,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-12 23:59:21,464 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-12 23:59:21,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-12 23:59:21,465 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-12 23:59:21,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-12 23:59:21,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-12 23:59:21,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-12 23:59:21,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-12 23:59:21,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:21,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-12 23:59:21,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-12 23:59:21,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-12 23:59:21,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-12 23:59:21,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-12 23:59:21,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-12 23:59:21,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-12 23:59:21,467 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46079a7f9ccd5156b224e35207d03a9ecc6f7ef0 [2021-10-12 23:59:21,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-12 23:59:21,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-12 23:59:21,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-12 23:59:21,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-12 23:59:21,773 INFO L275 PluginConnector]: CDTParser initialized [2021-10-12 23:59:21,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c [2021-10-12 23:59:21,848 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/data/545a820e9/007efea39cac44e88f14fe4391261a3a/FLAG55c188b1f [2021-10-12 23:59:22,614 INFO L306 CDTParser]: Found 1 translation units. [2021-10-12 23:59:22,615 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c [2021-10-12 23:59:22,642 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/data/545a820e9/007efea39cac44e88f14fe4391261a3a/FLAG55c188b1f [2021-10-12 23:59:22,777 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/data/545a820e9/007efea39cac44e88f14fe4391261a3a [2021-10-12 23:59:22,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-12 23:59:22,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-12 23:59:22,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:22,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-12 23:59:22,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-12 23:59:22,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:22" (1/1) ... [2021-10-12 23:59:22,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8873e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:22, skipping insertion in model container [2021-10-12 23:59:22,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:22" (1/1) ... [2021-10-12 23:59:22,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-12 23:59:22,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-12 23:59:23,388 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c[73891,73904] [2021-10-12 23:59:23,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:23,412 INFO L203 MainTranslator]: Completed pre-run [2021-10-12 23:59:23,594 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c[73891,73904] [2021-10-12 23:59:23,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:23,637 INFO L208 MainTranslator]: Completed translation [2021-10-12 23:59:23,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23 WrapperNode [2021-10-12 23:59:23,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:23,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:23,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-12 23:59:23,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-12 23:59:23,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (1/1) ... [2021-10-12 23:59:23,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (1/1) ... [2021-10-12 23:59:23,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:23,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-12 23:59:23,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-12 23:59:23,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-12 23:59:23,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (1/1) ... [2021-10-12 23:59:23,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (1/1) ... [2021-10-12 23:59:23,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (1/1) ... [2021-10-12 23:59:23,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (1/1) ... [2021-10-12 23:59:23,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (1/1) ... [2021-10-12 23:59:23,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (1/1) ... [2021-10-12 23:59:23,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (1/1) ... [2021-10-12 23:59:23,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-12 23:59:23,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-12 23:59:23,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-12 23:59:23,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-12 23:59:23,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (1/1) ... [2021-10-12 23:59:23,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:23,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:24,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:24,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-12 23:59:24,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-12 23:59:24,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-12 23:59:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-12 23:59:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-12 23:59:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-12 23:59:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-12 23:59:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-12 23:59:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-12 23:59:24,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-12 23:59:24,341 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-12 23:59:27,241 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-12 23:59:27,242 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-12 23:59:27,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-12 23:59:27,256 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-12 23:59:27,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:27 BoogieIcfgContainer [2021-10-12 23:59:27,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-12 23:59:27,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-12 23:59:27,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-12 23:59:27,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-12 23:59:27,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:59:22" (1/3) ... [2021-10-12 23:59:27,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2306b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:27, skipping insertion in model container [2021-10-12 23:59:27,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:23" (2/3) ... [2021-10-12 23:59:27,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2306b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:27, skipping insertion in model container [2021-10-12 23:59:27,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:27" (3/3) ... [2021-10-12 23:59:27,272 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-2.c [2021-10-12 23:59:27,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-12 23:59:27,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-12 23:59:27,346 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-12 23:59:27,356 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-12 23:59:27,356 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-12 23:59:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-12 23:59:27,384 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:27,385 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:27,385 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:27,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:27,391 INFO L82 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-10-12 23:59:27,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:27,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525279941] [2021-10-12 23:59:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:27,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:27,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:27,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525279941] [2021-10-12 23:59:27,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525279941] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:27,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:27,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:27,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775884038] [2021-10-12 23:59:27,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:27,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:27,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:27,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:27,837 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:29,546 INFO L93 Difference]: Finished difference Result 325 states and 550 transitions. [2021-10-12 23:59:29,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:29,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-12 23:59:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:29,561 INFO L225 Difference]: With dead ends: 325 [2021-10-12 23:59:29,562 INFO L226 Difference]: Without dead ends: 165 [2021-10-12 23:59:29,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-12 23:59:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-10-12 23:59:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5578231292517006) internal successors, (229), 147 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 229 transitions. [2021-10-12 23:59:29,612 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 229 transitions. Word has length 37 [2021-10-12 23:59:29,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:29,613 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 229 transitions. [2021-10-12 23:59:29,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 229 transitions. [2021-10-12 23:59:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-12 23:59:29,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:29,616 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:29,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-12 23:59:29,617 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1588864032, now seen corresponding path program 1 times [2021-10-12 23:59:29,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:29,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173020527] [2021-10-12 23:59:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:29,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:29,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:29,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173020527] [2021-10-12 23:59:29,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173020527] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:29,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:29,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:29,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548955992] [2021-10-12 23:59:29,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:29,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:29,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:29,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:29,816 INFO L87 Difference]: Start difference. First operand 148 states and 229 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:32,318 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2021-10-12 23:59:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:32,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-10-12 23:59:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:32,321 INFO L225 Difference]: With dead ends: 292 [2021-10-12 23:59:32,321 INFO L226 Difference]: Without dead ends: 165 [2021-10-12 23:59:32,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-12 23:59:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-10-12 23:59:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5510204081632653) internal successors, (228), 147 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 228 transitions. [2021-10-12 23:59:32,335 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 228 transitions. Word has length 50 [2021-10-12 23:59:32,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:32,336 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 228 transitions. [2021-10-12 23:59:32,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:32,336 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 228 transitions. [2021-10-12 23:59:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-12 23:59:32,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:32,339 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:32,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-12 23:59:32,339 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:32,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1079860431, now seen corresponding path program 1 times [2021-10-12 23:59:32,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:32,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325168651] [2021-10-12 23:59:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:32,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:32,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:32,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325168651] [2021-10-12 23:59:32,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325168651] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:32,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:32,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:32,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981824746] [2021-10-12 23:59:32,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:32,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:32,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:32,488 INFO L87 Difference]: Start difference. First operand 148 states and 228 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:34,919 INFO L93 Difference]: Finished difference Result 291 states and 444 transitions. [2021-10-12 23:59:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:34,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-12 23:59:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:34,922 INFO L225 Difference]: With dead ends: 291 [2021-10-12 23:59:34,922 INFO L226 Difference]: Without dead ends: 164 [2021-10-12 23:59:34,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-12 23:59:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-10-12 23:59:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5442176870748299) internal successors, (227), 147 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:34,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 227 transitions. [2021-10-12 23:59:34,939 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 227 transitions. Word has length 51 [2021-10-12 23:59:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:34,939 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 227 transitions. [2021-10-12 23:59:34,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:34,941 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 227 transitions. [2021-10-12 23:59:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-12 23:59:34,945 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:34,945 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:34,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-12 23:59:34,946 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:34,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:34,948 INFO L82 PathProgramCache]: Analyzing trace with hash -214281275, now seen corresponding path program 1 times [2021-10-12 23:59:34,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:34,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861027709] [2021-10-12 23:59:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:34,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:35,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:35,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861027709] [2021-10-12 23:59:35,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861027709] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:35,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:35,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:35,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952618899] [2021-10-12 23:59:35,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:35,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:35,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:35,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:35,092 INFO L87 Difference]: Start difference. First operand 148 states and 227 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:36,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:36,610 INFO L93 Difference]: Finished difference Result 291 states and 443 transitions. [2021-10-12 23:59:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:36,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-12 23:59:36,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:36,613 INFO L225 Difference]: With dead ends: 291 [2021-10-12 23:59:36,613 INFO L226 Difference]: Without dead ends: 164 [2021-10-12 23:59:36,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-12 23:59:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-10-12 23:59:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5374149659863945) internal successors, (226), 147 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 226 transitions. [2021-10-12 23:59:36,636 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 226 transitions. Word has length 51 [2021-10-12 23:59:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:36,636 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 226 transitions. [2021-10-12 23:59:36,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 226 transitions. [2021-10-12 23:59:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-12 23:59:36,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:36,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:36,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-12 23:59:36,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:36,641 INFO L82 PathProgramCache]: Analyzing trace with hash -603466340, now seen corresponding path program 1 times [2021-10-12 23:59:36,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:36,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756021028] [2021-10-12 23:59:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:36,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:36,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:36,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756021028] [2021-10-12 23:59:36,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756021028] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:36,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:36,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:36,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208894574] [2021-10-12 23:59:36,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:36,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:36,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:36,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:36,720 INFO L87 Difference]: Start difference. First operand 148 states and 226 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:39,098 INFO L93 Difference]: Finished difference Result 290 states and 441 transitions. [2021-10-12 23:59:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-12 23:59:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:39,100 INFO L225 Difference]: With dead ends: 290 [2021-10-12 23:59:39,101 INFO L226 Difference]: Without dead ends: 163 [2021-10-12 23:59:39,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-12 23:59:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 148. [2021-10-12 23:59:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.530612244897959) internal successors, (225), 147 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 225 transitions. [2021-10-12 23:59:39,109 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 225 transitions. Word has length 51 [2021-10-12 23:59:39,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:39,110 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 225 transitions. [2021-10-12 23:59:39,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:39,110 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 225 transitions. [2021-10-12 23:59:39,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-12 23:59:39,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:39,112 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:39,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-12 23:59:39,113 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:39,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1143611812, now seen corresponding path program 1 times [2021-10-12 23:59:39,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:39,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819183032] [2021-10-12 23:59:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:39,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:39,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:39,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819183032] [2021-10-12 23:59:39,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819183032] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:39,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:39,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:39,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065665862] [2021-10-12 23:59:39,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:39,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:39,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:39,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:39,265 INFO L87 Difference]: Start difference. First operand 148 states and 225 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:41,624 INFO L93 Difference]: Finished difference Result 288 states and 438 transitions. [2021-10-12 23:59:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-12 23:59:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:41,626 INFO L225 Difference]: With dead ends: 288 [2021-10-12 23:59:41,627 INFO L226 Difference]: Without dead ends: 161 [2021-10-12 23:59:41,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-12 23:59:41,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-10-12 23:59:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5238095238095237) internal successors, (224), 147 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 224 transitions. [2021-10-12 23:59:41,634 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 224 transitions. Word has length 51 [2021-10-12 23:59:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:41,634 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 224 transitions. [2021-10-12 23:59:41,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 224 transitions. [2021-10-12 23:59:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-12 23:59:41,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:41,636 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:41,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-12 23:59:41,637 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:41,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1443637303, now seen corresponding path program 1 times [2021-10-12 23:59:41,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:41,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363532351] [2021-10-12 23:59:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:41,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:41,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:41,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363532351] [2021-10-12 23:59:41,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363532351] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:41,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:41,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:41,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795676399] [2021-10-12 23:59:41,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:41,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:41,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:41,708 INFO L87 Difference]: Start difference. First operand 148 states and 224 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:44,072 INFO L93 Difference]: Finished difference Result 288 states and 437 transitions. [2021-10-12 23:59:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:44,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-12 23:59:44,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:44,074 INFO L225 Difference]: With dead ends: 288 [2021-10-12 23:59:44,074 INFO L226 Difference]: Without dead ends: 161 [2021-10-12 23:59:44,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-12 23:59:44,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-10-12 23:59:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5170068027210883) internal successors, (223), 147 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 223 transitions. [2021-10-12 23:59:44,080 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 223 transitions. Word has length 52 [2021-10-12 23:59:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:44,081 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 223 transitions. [2021-10-12 23:59:44,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 223 transitions. [2021-10-12 23:59:44,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-12 23:59:44,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:44,082 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:44,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-12 23:59:44,084 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:44,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:44,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1217419126, now seen corresponding path program 1 times [2021-10-12 23:59:44,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:44,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427041420] [2021-10-12 23:59:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:44,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:44,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:44,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427041420] [2021-10-12 23:59:44,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427041420] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:44,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:44,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:44,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298897063] [2021-10-12 23:59:44,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:44,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:44,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:44,217 INFO L87 Difference]: Start difference. First operand 148 states and 223 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:46,054 INFO L93 Difference]: Finished difference Result 288 states and 436 transitions. [2021-10-12 23:59:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:46,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-10-12 23:59:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:46,057 INFO L225 Difference]: With dead ends: 288 [2021-10-12 23:59:46,057 INFO L226 Difference]: Without dead ends: 161 [2021-10-12 23:59:46,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-12 23:59:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-10-12 23:59:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.510204081632653) internal successors, (222), 147 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 222 transitions. [2021-10-12 23:59:46,063 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 222 transitions. Word has length 53 [2021-10-12 23:59:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:46,063 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 222 transitions. [2021-10-12 23:59:46,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 222 transitions. [2021-10-12 23:59:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-12 23:59:46,064 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:46,064 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:46,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-12 23:59:46,065 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1181926446, now seen corresponding path program 1 times [2021-10-12 23:59:46,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:46,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048188563] [2021-10-12 23:59:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:46,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:46,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:46,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048188563] [2021-10-12 23:59:46,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048188563] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:46,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:46,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:46,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098490545] [2021-10-12 23:59:46,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:46,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:46,145 INFO L87 Difference]: Start difference. First operand 148 states and 222 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:48,459 INFO L93 Difference]: Finished difference Result 278 states and 422 transitions. [2021-10-12 23:59:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:48,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-12 23:59:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:48,461 INFO L225 Difference]: With dead ends: 278 [2021-10-12 23:59:48,461 INFO L226 Difference]: Without dead ends: 151 [2021-10-12 23:59:48,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:48,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-12 23:59:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2021-10-12 23:59:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5034013605442176) internal successors, (221), 147 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 221 transitions. [2021-10-12 23:59:48,466 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 221 transitions. Word has length 54 [2021-10-12 23:59:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:48,466 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 221 transitions. [2021-10-12 23:59:48,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 221 transitions. [2021-10-12 23:59:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-12 23:59:48,467 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:48,467 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:48,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-12 23:59:48,468 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:48,468 INFO L82 PathProgramCache]: Analyzing trace with hash 242366870, now seen corresponding path program 1 times [2021-10-12 23:59:48,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:48,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906786685] [2021-10-12 23:59:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:48,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:48,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:48,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906786685] [2021-10-12 23:59:48,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906786685] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:48,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:48,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:48,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628465502] [2021-10-12 23:59:48,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:48,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:48,564 INFO L87 Difference]: Start difference. First operand 148 states and 221 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:50,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:50,017 INFO L93 Difference]: Finished difference Result 318 states and 483 transitions. [2021-10-12 23:59:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:50,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-12 23:59:50,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:50,019 INFO L225 Difference]: With dead ends: 318 [2021-10-12 23:59:50,019 INFO L226 Difference]: Without dead ends: 191 [2021-10-12 23:59:50,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-12 23:59:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2021-10-12 23:59:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.532544378698225) internal successors, (259), 169 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 259 transitions. [2021-10-12 23:59:50,028 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 259 transitions. Word has length 54 [2021-10-12 23:59:50,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:50,029 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 259 transitions. [2021-10-12 23:59:50,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 259 transitions. [2021-10-12 23:59:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-12 23:59:50,030 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:50,030 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:50,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-12 23:59:50,031 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:50,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:50,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2113194624, now seen corresponding path program 1 times [2021-10-12 23:59:50,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:50,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760025241] [2021-10-12 23:59:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:50,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:50,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:50,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760025241] [2021-10-12 23:59:50,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760025241] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:50,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:50,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:50,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744601519] [2021-10-12 23:59:50,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:50,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:50,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:50,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:50,117 INFO L87 Difference]: Start difference. First operand 170 states and 259 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:51,005 INFO L93 Difference]: Finished difference Result 340 states and 520 transitions. [2021-10-12 23:59:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-10-12 23:59:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:51,007 INFO L225 Difference]: With dead ends: 340 [2021-10-12 23:59:51,007 INFO L226 Difference]: Without dead ends: 191 [2021-10-12 23:59:51,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-12 23:59:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2021-10-12 23:59:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5266272189349113) internal successors, (258), 169 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 258 transitions. [2021-10-12 23:59:51,014 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 258 transitions. Word has length 67 [2021-10-12 23:59:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:51,015 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 258 transitions. [2021-10-12 23:59:51,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 258 transitions. [2021-10-12 23:59:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-12 23:59:51,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:51,016 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:51,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-12 23:59:51,016 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:51,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2005481263, now seen corresponding path program 1 times [2021-10-12 23:59:51,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:51,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319908866] [2021-10-12 23:59:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:51,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:51,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:51,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319908866] [2021-10-12 23:59:51,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319908866] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:51,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:51,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:51,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738454361] [2021-10-12 23:59:51,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:51,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:51,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:51,081 INFO L87 Difference]: Start difference. First operand 170 states and 258 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:53,394 INFO L93 Difference]: Finished difference Result 339 states and 517 transitions. [2021-10-12 23:59:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:53,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-10-12 23:59:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:53,396 INFO L225 Difference]: With dead ends: 339 [2021-10-12 23:59:53,396 INFO L226 Difference]: Without dead ends: 190 [2021-10-12 23:59:53,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:53,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-12 23:59:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 170. [2021-10-12 23:59:53,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5207100591715976) internal successors, (257), 169 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:53,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 257 transitions. [2021-10-12 23:59:53,422 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 257 transitions. Word has length 68 [2021-10-12 23:59:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:53,422 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 257 transitions. [2021-10-12 23:59:53,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 257 transitions. [2021-10-12 23:59:53,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-12 23:59:53,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:53,423 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:53,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-12 23:59:53,424 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:53,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:53,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1139902107, now seen corresponding path program 1 times [2021-10-12 23:59:53,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:53,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852255754] [2021-10-12 23:59:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:53,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:53,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:53,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852255754] [2021-10-12 23:59:53,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852255754] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:53,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:53,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:53,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822633231] [2021-10-12 23:59:53,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:53,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:53,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:53,484 INFO L87 Difference]: Start difference. First operand 170 states and 257 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:55,787 INFO L93 Difference]: Finished difference Result 339 states and 515 transitions. [2021-10-12 23:59:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-10-12 23:59:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:55,789 INFO L225 Difference]: With dead ends: 339 [2021-10-12 23:59:55,789 INFO L226 Difference]: Without dead ends: 190 [2021-10-12 23:59:55,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-12 23:59:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 170. [2021-10-12 23:59:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.514792899408284) internal successors, (256), 169 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 256 transitions. [2021-10-12 23:59:55,795 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 256 transitions. Word has length 68 [2021-10-12 23:59:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:55,796 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 256 transitions. [2021-10-12 23:59:55,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 256 transitions. [2021-10-12 23:59:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-12 23:59:55,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:55,797 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:55,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-12 23:59:55,798 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:55,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1529087172, now seen corresponding path program 1 times [2021-10-12 23:59:55,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:55,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958575310] [2021-10-12 23:59:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:55,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:55,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:55,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958575310] [2021-10-12 23:59:55,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958575310] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:55,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:55,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:55,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585405189] [2021-10-12 23:59:55,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:55,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:55,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:55,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:55,860 INFO L87 Difference]: Start difference. First operand 170 states and 256 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:56,460 INFO L93 Difference]: Finished difference Result 338 states and 512 transitions. [2021-10-12 23:59:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:56,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-10-12 23:59:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:56,462 INFO L225 Difference]: With dead ends: 338 [2021-10-12 23:59:56,462 INFO L226 Difference]: Without dead ends: 189 [2021-10-12 23:59:56,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-12 23:59:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 170. [2021-10-12 23:59:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5088757396449703) internal successors, (255), 169 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 255 transitions. [2021-10-12 23:59:56,469 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 255 transitions. Word has length 68 [2021-10-12 23:59:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:56,469 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 255 transitions. [2021-10-12 23:59:56,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 255 transitions. [2021-10-12 23:59:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-12 23:59:56,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:56,470 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:56,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-12 23:59:56,471 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:56,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2069232644, now seen corresponding path program 1 times [2021-10-12 23:59:56,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:56,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803886049] [2021-10-12 23:59:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:56,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:56,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:56,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803886049] [2021-10-12 23:59:56,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803886049] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:56,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:56,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:56,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716301249] [2021-10-12 23:59:56,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:56,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:56,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:56,529 INFO L87 Difference]: Start difference. First operand 170 states and 255 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:57,208 INFO L93 Difference]: Finished difference Result 336 states and 508 transitions. [2021-10-12 23:59:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-10-12 23:59:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:57,210 INFO L225 Difference]: With dead ends: 336 [2021-10-12 23:59:57,210 INFO L226 Difference]: Without dead ends: 187 [2021-10-12 23:59:57,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-12 23:59:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-10-12 23:59:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5029585798816567) internal successors, (254), 169 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 254 transitions. [2021-10-12 23:59:57,217 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 254 transitions. Word has length 68 [2021-10-12 23:59:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:57,218 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 254 transitions. [2021-10-12 23:59:57,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:57,218 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 254 transitions. [2021-10-12 23:59:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-12 23:59:57,219 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:57,219 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:57,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-12 23:59:57,220 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:57,220 INFO L82 PathProgramCache]: Analyzing trace with hash -73112023, now seen corresponding path program 1 times [2021-10-12 23:59:57,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:57,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686553901] [2021-10-12 23:59:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:57,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:57,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:57,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686553901] [2021-10-12 23:59:57,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686553901] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:57,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:57,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:57,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78746776] [2021-10-12 23:59:57,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:57,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:57,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:57,294 INFO L87 Difference]: Start difference. First operand 170 states and 254 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:58,990 INFO L93 Difference]: Finished difference Result 336 states and 506 transitions. [2021-10-12 23:59:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-10-12 23:59:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:58,992 INFO L225 Difference]: With dead ends: 336 [2021-10-12 23:59:58,992 INFO L226 Difference]: Without dead ends: 187 [2021-10-12 23:59:58,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-12 23:59:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-10-12 23:59:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.4970414201183433) internal successors, (253), 169 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 253 transitions. [2021-10-12 23:59:58,999 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 253 transitions. Word has length 69 [2021-10-12 23:59:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:59,000 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 253 transitions. [2021-10-12 23:59:59,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 253 transitions. [2021-10-12 23:59:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-12 23:59:59,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:59,001 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:59,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-12 23:59:59,001 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:59,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1680808406, now seen corresponding path program 1 times [2021-10-12 23:59:59,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:59,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040089841] [2021-10-12 23:59:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:59,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:59,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:59,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040089841] [2021-10-12 23:59:59,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040089841] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:59,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:59,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:59,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119160382] [2021-10-12 23:59:59,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:59,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:59,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:59,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:59,058 INFO L87 Difference]: Start difference. First operand 170 states and 253 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:00,153 INFO L93 Difference]: Finished difference Result 336 states and 504 transitions. [2021-10-13 00:00:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:00,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-10-13 00:00:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:00,155 INFO L225 Difference]: With dead ends: 336 [2021-10-13 00:00:00,155 INFO L226 Difference]: Without dead ends: 187 [2021-10-13 00:00:00,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-13 00:00:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-10-13 00:00:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.4911242603550297) internal successors, (252), 169 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 252 transitions. [2021-10-13 00:00:00,161 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 252 transitions. Word has length 70 [2021-10-13 00:00:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:00,162 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 252 transitions. [2021-10-13 00:00:00,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 252 transitions. [2021-10-13 00:00:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-13 00:00:00,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:00,163 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:00,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 00:00:00,163 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:00,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:00,164 INFO L82 PathProgramCache]: Analyzing trace with hash -298239346, now seen corresponding path program 1 times [2021-10-13 00:00:00,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:00,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91139015] [2021-10-13 00:00:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:00,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:00:00,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:00,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91139015] [2021-10-13 00:00:00,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91139015] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:00,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:00,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:00,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249036233] [2021-10-13 00:00:00,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:00,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:00,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:00,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:00,220 INFO L87 Difference]: Start difference. First operand 170 states and 252 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:02,438 INFO L93 Difference]: Finished difference Result 326 states and 489 transitions. [2021-10-13 00:00:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:02,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-13 00:00:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:02,439 INFO L225 Difference]: With dead ends: 326 [2021-10-13 00:00:02,439 INFO L226 Difference]: Without dead ends: 177 [2021-10-13 00:00:02,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:02,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-13 00:00:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2021-10-13 00:00:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.485207100591716) internal successors, (251), 169 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 251 transitions. [2021-10-13 00:00:02,446 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 251 transitions. Word has length 71 [2021-10-13 00:00:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:02,446 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 251 transitions. [2021-10-13 00:00:02,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 251 transitions. [2021-10-13 00:00:02,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-13 00:00:02,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:02,448 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:02,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 00:00:02,448 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1040793707, now seen corresponding path program 1 times [2021-10-13 00:00:02,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:02,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718460021] [2021-10-13 00:00:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:02,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:02,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:02,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718460021] [2021-10-13 00:00:02,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718460021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:02,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:02,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:02,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84314426] [2021-10-13 00:00:02,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:02,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:02,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:02,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:02,516 INFO L87 Difference]: Start difference. First operand 170 states and 251 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:03,624 INFO L93 Difference]: Finished difference Result 424 states and 638 transitions. [2021-10-13 00:00:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-13 00:00:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:03,626 INFO L225 Difference]: With dead ends: 424 [2021-10-13 00:00:03,627 INFO L226 Difference]: Without dead ends: 275 [2021-10-13 00:00:03,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-10-13 00:00:03,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 200. [2021-10-13 00:00:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.5226130653266332) internal successors, (303), 199 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 303 transitions. [2021-10-13 00:00:03,634 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 303 transitions. Word has length 76 [2021-10-13 00:00:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:03,634 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 303 transitions. [2021-10-13 00:00:03,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 303 transitions. [2021-10-13 00:00:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-13 00:00:03,635 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:03,635 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:03,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-13 00:00:03,636 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:03,636 INFO L82 PathProgramCache]: Analyzing trace with hash 968407149, now seen corresponding path program 1 times [2021-10-13 00:00:03,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:03,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713081807] [2021-10-13 00:00:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:03,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:03,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:03,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713081807] [2021-10-13 00:00:03,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713081807] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:03,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:03,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:03,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804471787] [2021-10-13 00:00:03,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:03,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:03,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:03,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:03,704 INFO L87 Difference]: Start difference. First operand 200 states and 303 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:05,930 INFO L93 Difference]: Finished difference Result 429 states and 658 transitions. [2021-10-13 00:00:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:05,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-13 00:00:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:05,933 INFO L225 Difference]: With dead ends: 429 [2021-10-13 00:00:05,933 INFO L226 Difference]: Without dead ends: 250 [2021-10-13 00:00:05,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-13 00:00:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 224. [2021-10-13 00:00:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.547085201793722) internal successors, (345), 223 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 345 transitions. [2021-10-13 00:00:05,940 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 345 transitions. Word has length 76 [2021-10-13 00:00:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:05,941 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 345 transitions. [2021-10-13 00:00:05,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 345 transitions. [2021-10-13 00:00:05,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 00:00:05,942 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:05,942 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:05,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-13 00:00:05,943 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:05,943 INFO L82 PathProgramCache]: Analyzing trace with hash 293504549, now seen corresponding path program 1 times [2021-10-13 00:00:05,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:05,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830899953] [2021-10-13 00:00:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:05,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:06,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:06,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830899953] [2021-10-13 00:00:06,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830899953] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:06,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:06,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:06,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105508810] [2021-10-13 00:00:06,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:06,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:06,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:06,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:06,020 INFO L87 Difference]: Start difference. First operand 224 states and 345 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:07,786 INFO L93 Difference]: Finished difference Result 494 states and 760 transitions. [2021-10-13 00:00:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:07,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-13 00:00:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:07,789 INFO L225 Difference]: With dead ends: 494 [2021-10-13 00:00:07,789 INFO L226 Difference]: Without dead ends: 291 [2021-10-13 00:00:07,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-13 00:00:07,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 225. [2021-10-13 00:00:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5446428571428572) internal successors, (346), 224 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 346 transitions. [2021-10-13 00:00:07,797 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 346 transitions. Word has length 77 [2021-10-13 00:00:07,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:07,798 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 346 transitions. [2021-10-13 00:00:07,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:07,798 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 346 transitions. [2021-10-13 00:00:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-13 00:00:07,799 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:07,799 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:07,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-13 00:00:07,800 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:07,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2009733770, now seen corresponding path program 1 times [2021-10-13 00:00:07,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:07,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713240420] [2021-10-13 00:00:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:07,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:07,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:07,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713240420] [2021-10-13 00:00:07,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713240420] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:07,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:07,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:07,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350548663] [2021-10-13 00:00:07,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:07,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:07,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:07,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:07,902 INFO L87 Difference]: Start difference. First operand 225 states and 346 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:08,855 INFO L93 Difference]: Finished difference Result 495 states and 760 transitions. [2021-10-13 00:00:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:08,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-10-13 00:00:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:08,860 INFO L225 Difference]: With dead ends: 495 [2021-10-13 00:00:08,860 INFO L226 Difference]: Without dead ends: 291 [2021-10-13 00:00:08,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-13 00:00:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 235. [2021-10-13 00:00:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5598290598290598) internal successors, (365), 234 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 365 transitions. [2021-10-13 00:00:08,868 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 365 transitions. Word has length 82 [2021-10-13 00:00:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:08,868 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 365 transitions. [2021-10-13 00:00:08,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 365 transitions. [2021-10-13 00:00:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-13 00:00:08,869 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:08,870 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:08,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-13 00:00:08,870 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:08,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2129799745, now seen corresponding path program 1 times [2021-10-13 00:00:08,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:08,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342482767] [2021-10-13 00:00:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:08,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:08,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:08,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342482767] [2021-10-13 00:00:08,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342482767] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:08,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:08,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:08,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102252388] [2021-10-13 00:00:08,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:08,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:08,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:08,942 INFO L87 Difference]: Start difference. First operand 235 states and 365 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:10,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:10,347 INFO L93 Difference]: Finished difference Result 499 states and 771 transitions. [2021-10-13 00:00:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:10,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-10-13 00:00:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:10,351 INFO L225 Difference]: With dead ends: 499 [2021-10-13 00:00:10,351 INFO L226 Difference]: Without dead ends: 285 [2021-10-13 00:00:10,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-10-13 00:00:10,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 236. [2021-10-13 00:00:10,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5574468085106383) internal successors, (366), 235 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 366 transitions. [2021-10-13 00:00:10,359 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 366 transitions. Word has length 83 [2021-10-13 00:00:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:10,359 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 366 transitions. [2021-10-13 00:00:10,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 366 transitions. [2021-10-13 00:00:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-13 00:00:10,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:10,361 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:10,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-13 00:00:10,362 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:10,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1140832821, now seen corresponding path program 1 times [2021-10-13 00:00:10,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:10,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000043722] [2021-10-13 00:00:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:10,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:10,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:10,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000043722] [2021-10-13 00:00:10,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000043722] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:10,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:10,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:10,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797957003] [2021-10-13 00:00:10,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:10,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:10,426 INFO L87 Difference]: Start difference. First operand 236 states and 366 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:12,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:12,710 INFO L93 Difference]: Finished difference Result 500 states and 771 transitions. [2021-10-13 00:00:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-10-13 00:00:12,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:12,712 INFO L225 Difference]: With dead ends: 500 [2021-10-13 00:00:12,712 INFO L226 Difference]: Without dead ends: 285 [2021-10-13 00:00:12,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-10-13 00:00:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 236. [2021-10-13 00:00:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.553191489361702) internal successors, (365), 235 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 365 transitions. [2021-10-13 00:00:12,720 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 365 transitions. Word has length 89 [2021-10-13 00:00:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:12,720 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 365 transitions. [2021-10-13 00:00:12,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 365 transitions. [2021-10-13 00:00:12,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-13 00:00:12,721 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:12,722 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:12,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-13 00:00:12,722 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:12,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:12,723 INFO L82 PathProgramCache]: Analyzing trace with hash 787439881, now seen corresponding path program 1 times [2021-10-13 00:00:12,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:12,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71351739] [2021-10-13 00:00:12,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:12,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:12,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:12,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71351739] [2021-10-13 00:00:12,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71351739] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:12,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:12,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:12,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568405256] [2021-10-13 00:00:12,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:12,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:12,789 INFO L87 Difference]: Start difference. First operand 236 states and 365 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:13,669 INFO L93 Difference]: Finished difference Result 477 states and 739 transitions. [2021-10-13 00:00:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-10-13 00:00:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:13,670 INFO L225 Difference]: With dead ends: 477 [2021-10-13 00:00:13,671 INFO L226 Difference]: Without dead ends: 262 [2021-10-13 00:00:13,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-13 00:00:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 236. [2021-10-13 00:00:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.548936170212766) internal successors, (364), 235 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 364 transitions. [2021-10-13 00:00:13,678 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 364 transitions. Word has length 89 [2021-10-13 00:00:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:13,678 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 364 transitions. [2021-10-13 00:00:13,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 364 transitions. [2021-10-13 00:00:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-13 00:00:13,679 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:13,680 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:13,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-13 00:00:13,680 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:13,681 INFO L82 PathProgramCache]: Analyzing trace with hash 198883046, now seen corresponding path program 1 times [2021-10-13 00:00:13,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:13,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501228275] [2021-10-13 00:00:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:13,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:13,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:13,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501228275] [2021-10-13 00:00:13,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501228275] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:13,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:13,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:13,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212229800] [2021-10-13 00:00:13,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:13,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:13,743 INFO L87 Difference]: Start difference. First operand 236 states and 364 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:16,077 INFO L93 Difference]: Finished difference Result 499 states and 766 transitions. [2021-10-13 00:00:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:16,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-10-13 00:00:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:16,079 INFO L225 Difference]: With dead ends: 499 [2021-10-13 00:00:16,080 INFO L226 Difference]: Without dead ends: 284 [2021-10-13 00:00:16,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-13 00:00:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 236. [2021-10-13 00:00:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5446808510638297) internal successors, (363), 235 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 363 transitions. [2021-10-13 00:00:16,087 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 363 transitions. Word has length 90 [2021-10-13 00:00:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:16,087 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 363 transitions. [2021-10-13 00:00:16,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 363 transitions. [2021-10-13 00:00:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-13 00:00:16,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:16,089 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:16,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-13 00:00:16,089 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1064462202, now seen corresponding path program 1 times [2021-10-13 00:00:16,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:16,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550641613] [2021-10-13 00:00:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:16,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-13 00:00:16,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:16,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550641613] [2021-10-13 00:00:16,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550641613] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:16,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:16,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:00:16,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811540407] [2021-10-13 00:00:16,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:00:16,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:16,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:00:16,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:16,178 INFO L87 Difference]: Start difference. First operand 236 states and 363 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:20,565 INFO L93 Difference]: Finished difference Result 472 states and 731 transitions. [2021-10-13 00:00:20,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:00:20,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-10-13 00:00:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:20,567 INFO L225 Difference]: With dead ends: 472 [2021-10-13 00:00:20,567 INFO L226 Difference]: Without dead ends: 257 [2021-10-13 00:00:20,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:00:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-10-13 00:00:20,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2021-10-13 00:00:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5254901960784313) internal successors, (389), 255 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 389 transitions. [2021-10-13 00:00:20,574 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 389 transitions. Word has length 90 [2021-10-13 00:00:20,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:20,575 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 389 transitions. [2021-10-13 00:00:20,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 389 transitions. [2021-10-13 00:00:20,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-13 00:00:20,576 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:20,577 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:20,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-13 00:00:20,577 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:20,578 INFO L82 PathProgramCache]: Analyzing trace with hash 675277137, now seen corresponding path program 1 times [2021-10-13 00:00:20,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:20,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941808244] [2021-10-13 00:00:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:20,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:20,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:20,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941808244] [2021-10-13 00:00:20,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941808244] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:20,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:20,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:20,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837840889] [2021-10-13 00:00:20,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:20,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:20,643 INFO L87 Difference]: Start difference. First operand 256 states and 389 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:22,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:22,993 INFO L93 Difference]: Finished difference Result 538 states and 814 transitions. [2021-10-13 00:00:22,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:22,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-10-13 00:00:22,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:22,996 INFO L225 Difference]: With dead ends: 538 [2021-10-13 00:00:22,996 INFO L226 Difference]: Without dead ends: 303 [2021-10-13 00:00:22,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-10-13 00:00:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 256. [2021-10-13 00:00:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5215686274509803) internal successors, (388), 255 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 388 transitions. [2021-10-13 00:00:23,005 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 388 transitions. Word has length 90 [2021-10-13 00:00:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:23,005 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 388 transitions. [2021-10-13 00:00:23,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 388 transitions. [2021-10-13 00:00:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-13 00:00:23,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:23,007 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-13 00:00:23,007 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:23,008 INFO L82 PathProgramCache]: Analyzing trace with hash 135131665, now seen corresponding path program 1 times [2021-10-13 00:00:23,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:23,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226817644] [2021-10-13 00:00:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:23,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:23,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:23,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226817644] [2021-10-13 00:00:23,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226817644] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:23,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:23,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:23,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147261306] [2021-10-13 00:00:23,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:23,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:23,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:23,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:23,070 INFO L87 Difference]: Start difference. First operand 256 states and 388 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:24,548 INFO L93 Difference]: Finished difference Result 536 states and 810 transitions. [2021-10-13 00:00:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-10-13 00:00:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:24,550 INFO L225 Difference]: With dead ends: 536 [2021-10-13 00:00:24,550 INFO L226 Difference]: Without dead ends: 301 [2021-10-13 00:00:24,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-13 00:00:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 256. [2021-10-13 00:00:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5176470588235293) internal successors, (387), 255 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 387 transitions. [2021-10-13 00:00:24,559 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 387 transitions. Word has length 90 [2021-10-13 00:00:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:24,560 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 387 transitions. [2021-10-13 00:00:24,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 387 transitions. [2021-10-13 00:00:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-13 00:00:24,561 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:24,561 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:24,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-13 00:00:24,562 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:24,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:24,562 INFO L82 PathProgramCache]: Analyzing trace with hash 322188755, now seen corresponding path program 1 times [2021-10-13 00:00:24,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:24,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603700830] [2021-10-13 00:00:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:24,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:24,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:24,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603700830] [2021-10-13 00:00:24,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603700830] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:24,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:24,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:24,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926778984] [2021-10-13 00:00:24,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:24,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:24,665 INFO L87 Difference]: Start difference. First operand 256 states and 387 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:26,956 INFO L93 Difference]: Finished difference Result 515 states and 780 transitions. [2021-10-13 00:00:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:26,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-10-13 00:00:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:26,958 INFO L225 Difference]: With dead ends: 515 [2021-10-13 00:00:26,958 INFO L226 Difference]: Without dead ends: 280 [2021-10-13 00:00:26,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:26,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-13 00:00:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 256. [2021-10-13 00:00:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5137254901960784) internal successors, (386), 255 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 386 transitions. [2021-10-13 00:00:26,967 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 386 transitions. Word has length 90 [2021-10-13 00:00:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:26,967 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 386 transitions. [2021-10-13 00:00:26,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 386 transitions. [2021-10-13 00:00:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-13 00:00:26,969 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:26,969 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:26,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-13 00:00:26,970 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:26,970 INFO L82 PathProgramCache]: Analyzing trace with hash -217956717, now seen corresponding path program 1 times [2021-10-13 00:00:26,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:26,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91210733] [2021-10-13 00:00:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:26,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:27,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:27,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91210733] [2021-10-13 00:00:27,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91210733] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:27,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:27,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:27,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949516255] [2021-10-13 00:00:27,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:27,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:27,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:27,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:27,038 INFO L87 Difference]: Start difference. First operand 256 states and 386 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:29,275 INFO L93 Difference]: Finished difference Result 513 states and 776 transitions. [2021-10-13 00:00:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-10-13 00:00:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:29,277 INFO L225 Difference]: With dead ends: 513 [2021-10-13 00:00:29,277 INFO L226 Difference]: Without dead ends: 278 [2021-10-13 00:00:29,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-13 00:00:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-10-13 00:00:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5098039215686274) internal successors, (385), 255 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 385 transitions. [2021-10-13 00:00:29,286 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 385 transitions. Word has length 90 [2021-10-13 00:00:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:29,286 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 385 transitions. [2021-10-13 00:00:29,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 385 transitions. [2021-10-13 00:00:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-13 00:00:29,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:29,288 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:29,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-13 00:00:29,288 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:29,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash -326145177, now seen corresponding path program 1 times [2021-10-13 00:00:29,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:29,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048528872] [2021-10-13 00:00:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:29,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:29,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:29,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048528872] [2021-10-13 00:00:29,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048528872] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:29,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:29,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:29,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765789801] [2021-10-13 00:00:29,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:29,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:29,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:29,353 INFO L87 Difference]: Start difference. First operand 256 states and 385 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:31,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:31,397 INFO L93 Difference]: Finished difference Result 536 states and 804 transitions. [2021-10-13 00:00:31,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:31,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-10-13 00:00:31,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:31,398 INFO L225 Difference]: With dead ends: 536 [2021-10-13 00:00:31,398 INFO L226 Difference]: Without dead ends: 301 [2021-10-13 00:00:31,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-13 00:00:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 256. [2021-10-13 00:00:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5058823529411764) internal successors, (384), 255 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 384 transitions. [2021-10-13 00:00:31,434 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 384 transitions. Word has length 91 [2021-10-13 00:00:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:31,434 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 384 transitions. [2021-10-13 00:00:31,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 384 transitions. [2021-10-13 00:00:31,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-13 00:00:31,436 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:31,436 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:31,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-13 00:00:31,436 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:31,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:31,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1613016869, now seen corresponding path program 1 times [2021-10-13 00:00:31,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:31,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782034002] [2021-10-13 00:00:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:31,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:31,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:31,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782034002] [2021-10-13 00:00:31,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782034002] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:31,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:31,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:31,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832387074] [2021-10-13 00:00:31,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:31,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:31,508 INFO L87 Difference]: Start difference. First operand 256 states and 384 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:32,860 INFO L93 Difference]: Finished difference Result 513 states and 772 transitions. [2021-10-13 00:00:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:32,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-10-13 00:00:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:32,862 INFO L225 Difference]: With dead ends: 513 [2021-10-13 00:00:32,862 INFO L226 Difference]: Without dead ends: 278 [2021-10-13 00:00:32,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-13 00:00:32,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-10-13 00:00:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5019607843137255) internal successors, (383), 255 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 383 transitions. [2021-10-13 00:00:32,871 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 383 transitions. Word has length 91 [2021-10-13 00:00:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:32,871 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 383 transitions. [2021-10-13 00:00:32,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 383 transitions. [2021-10-13 00:00:32,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-13 00:00:32,873 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:32,873 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:32,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-13 00:00:32,873 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash -255983763, now seen corresponding path program 1 times [2021-10-13 00:00:32,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:32,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729353260] [2021-10-13 00:00:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:32,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:32,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:32,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729353260] [2021-10-13 00:00:32,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729353260] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:32,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:32,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:32,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044000837] [2021-10-13 00:00:32,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:32,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:32,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:32,936 INFO L87 Difference]: Start difference. First operand 256 states and 383 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:34,416 INFO L93 Difference]: Finished difference Result 536 states and 800 transitions. [2021-10-13 00:00:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:34,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-10-13 00:00:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:34,419 INFO L225 Difference]: With dead ends: 536 [2021-10-13 00:00:34,419 INFO L226 Difference]: Without dead ends: 301 [2021-10-13 00:00:34,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:34,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-13 00:00:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 256. [2021-10-13 00:00:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4980392156862745) internal successors, (382), 255 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 382 transitions. [2021-10-13 00:00:34,428 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 382 transitions. Word has length 92 [2021-10-13 00:00:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:34,428 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 382 transitions. [2021-10-13 00:00:34,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:34,429 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 382 transitions. [2021-10-13 00:00:34,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-13 00:00:34,430 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:34,430 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:34,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-10-13 00:00:34,430 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:34,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:34,431 INFO L82 PathProgramCache]: Analyzing trace with hash -271502481, now seen corresponding path program 1 times [2021-10-13 00:00:34,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:34,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084602451] [2021-10-13 00:00:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:34,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:34,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:34,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084602451] [2021-10-13 00:00:34,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084602451] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:34,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:34,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:34,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505341679] [2021-10-13 00:00:34,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:34,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:34,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:34,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:34,495 INFO L87 Difference]: Start difference. First operand 256 states and 382 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:35,973 INFO L93 Difference]: Finished difference Result 513 states and 768 transitions. [2021-10-13 00:00:35,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:35,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-10-13 00:00:35,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:35,975 INFO L225 Difference]: With dead ends: 513 [2021-10-13 00:00:35,975 INFO L226 Difference]: Without dead ends: 278 [2021-10-13 00:00:35,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-13 00:00:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-10-13 00:00:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4941176470588236) internal successors, (381), 255 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 381 transitions. [2021-10-13 00:00:35,984 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 381 transitions. Word has length 92 [2021-10-13 00:00:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:35,984 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 381 transitions. [2021-10-13 00:00:35,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 381 transitions. [2021-10-13 00:00:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-13 00:00:35,986 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:35,986 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:35,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-13 00:00:35,986 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 636985474, now seen corresponding path program 1 times [2021-10-13 00:00:35,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:35,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336177413] [2021-10-13 00:00:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:35,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:36,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:36,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336177413] [2021-10-13 00:00:36,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336177413] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:36,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:36,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:36,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42515306] [2021-10-13 00:00:36,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:36,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:36,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:36,050 INFO L87 Difference]: Start difference. First operand 256 states and 381 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:38,462 INFO L93 Difference]: Finished difference Result 536 states and 796 transitions. [2021-10-13 00:00:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:38,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-10-13 00:00:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:38,464 INFO L225 Difference]: With dead ends: 536 [2021-10-13 00:00:38,465 INFO L226 Difference]: Without dead ends: 301 [2021-10-13 00:00:38,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-13 00:00:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 256. [2021-10-13 00:00:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4901960784313726) internal successors, (380), 255 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 380 transitions. [2021-10-13 00:00:38,475 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 380 transitions. Word has length 93 [2021-10-13 00:00:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:38,475 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 380 transitions. [2021-10-13 00:00:38,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 380 transitions. [2021-10-13 00:00:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-13 00:00:38,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:38,477 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:38,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-10-13 00:00:38,477 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:38,478 INFO L82 PathProgramCache]: Analyzing trace with hash 155905216, now seen corresponding path program 1 times [2021-10-13 00:00:38,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:38,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241322551] [2021-10-13 00:00:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:38,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:38,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:38,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241322551] [2021-10-13 00:00:38,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241322551] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:38,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:38,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:38,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110776821] [2021-10-13 00:00:38,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:38,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:38,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:38,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:38,543 INFO L87 Difference]: Start difference. First operand 256 states and 380 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:39,822 INFO L93 Difference]: Finished difference Result 513 states and 764 transitions. [2021-10-13 00:00:39,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:39,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-10-13 00:00:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:39,824 INFO L225 Difference]: With dead ends: 513 [2021-10-13 00:00:39,824 INFO L226 Difference]: Without dead ends: 278 [2021-10-13 00:00:39,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-13 00:00:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-10-13 00:00:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4862745098039216) internal successors, (379), 255 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 379 transitions. [2021-10-13 00:00:39,839 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 379 transitions. Word has length 93 [2021-10-13 00:00:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:39,839 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 379 transitions. [2021-10-13 00:00:39,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 379 transitions. [2021-10-13 00:00:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-13 00:00:39,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:39,841 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:39,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-10-13 00:00:39,842 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1267193448, now seen corresponding path program 1 times [2021-10-13 00:00:39,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:39,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069362065] [2021-10-13 00:00:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:39,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:39,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:39,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069362065] [2021-10-13 00:00:39,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069362065] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:39,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:39,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:39,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420051424] [2021-10-13 00:00:39,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:39,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:39,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:39,940 INFO L87 Difference]: Start difference. First operand 256 states and 379 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:42,303 INFO L93 Difference]: Finished difference Result 526 states and 780 transitions. [2021-10-13 00:00:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:42,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-10-13 00:00:42,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:42,310 INFO L225 Difference]: With dead ends: 526 [2021-10-13 00:00:42,311 INFO L226 Difference]: Without dead ends: 291 [2021-10-13 00:00:42,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-13 00:00:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 256. [2021-10-13 00:00:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4823529411764707) internal successors, (378), 255 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 378 transitions. [2021-10-13 00:00:42,321 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 378 transitions. Word has length 94 [2021-10-13 00:00:42,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:42,321 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 378 transitions. [2021-10-13 00:00:42,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 378 transitions. [2021-10-13 00:00:42,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-13 00:00:42,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:42,323 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:42,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-13 00:00:42,324 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:42,324 INFO L82 PathProgramCache]: Analyzing trace with hash -761392662, now seen corresponding path program 1 times [2021-10-13 00:00:42,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:42,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576121060] [2021-10-13 00:00:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:42,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:42,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:42,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576121060] [2021-10-13 00:00:42,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576121060] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:42,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:42,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:42,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843232493] [2021-10-13 00:00:42,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:42,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:42,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:42,396 INFO L87 Difference]: Start difference. First operand 256 states and 378 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:43,827 INFO L93 Difference]: Finished difference Result 503 states and 748 transitions. [2021-10-13 00:00:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:43,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-10-13 00:00:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:43,829 INFO L225 Difference]: With dead ends: 503 [2021-10-13 00:00:43,829 INFO L226 Difference]: Without dead ends: 268 [2021-10-13 00:00:43,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-13 00:00:43,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 256. [2021-10-13 00:00:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4784313725490197) internal successors, (377), 255 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 377 transitions. [2021-10-13 00:00:43,839 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 377 transitions. Word has length 94 [2021-10-13 00:00:43,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:43,839 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 377 transitions. [2021-10-13 00:00:43,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 377 transitions. [2021-10-13 00:00:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-13 00:00:43,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:43,841 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:43,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-10-13 00:00:43,841 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:43,841 INFO L82 PathProgramCache]: Analyzing trace with hash 920784942, now seen corresponding path program 1 times [2021-10-13 00:00:43,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:43,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688766030] [2021-10-13 00:00:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:43,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:00:43,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:43,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688766030] [2021-10-13 00:00:43,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688766030] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:43,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:43,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:00:43,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253962336] [2021-10-13 00:00:43,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:00:43,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:00:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:00:43,917 INFO L87 Difference]: Start difference. First operand 256 states and 377 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:45,930 INFO L93 Difference]: Finished difference Result 526 states and 776 transitions. [2021-10-13 00:00:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:00:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-10-13 00:00:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:45,932 INFO L225 Difference]: With dead ends: 526 [2021-10-13 00:00:45,933 INFO L226 Difference]: Without dead ends: 291 [2021-10-13 00:00:45,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:45,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-13 00:00:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 256. [2021-10-13 00:00:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4745098039215687) internal successors, (376), 255 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 376 transitions. [2021-10-13 00:00:45,942 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 376 transitions. Word has length 98 [2021-10-13 00:00:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:45,942 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 376 transitions. [2021-10-13 00:00:45,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 376 transitions. [2021-10-13 00:00:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-13 00:00:45,964 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:45,964 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:45,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-10-13 00:00:45,965 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:45,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:45,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1987396944, now seen corresponding path program 1 times [2021-10-13 00:00:45,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:45,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075166713] [2021-10-13 00:00:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:45,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 00:00:46,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:46,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075166713] [2021-10-13 00:00:46,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075166713] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:46,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:46,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:46,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417139742] [2021-10-13 00:00:46,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:46,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:46,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,045 INFO L87 Difference]: Start difference. First operand 256 states and 376 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:46,093 INFO L93 Difference]: Finished difference Result 719 states and 1070 transitions. [2021-10-13 00:00:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:46,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-10-13 00:00:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:46,096 INFO L225 Difference]: With dead ends: 719 [2021-10-13 00:00:46,097 INFO L226 Difference]: Without dead ends: 484 [2021-10-13 00:00:46,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-10-13 00:00:46,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2021-10-13 00:00:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.4720496894409938) internal successors, (711), 483 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 711 transitions. [2021-10-13 00:00:46,112 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 711 transitions. Word has length 98 [2021-10-13 00:00:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:46,113 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 711 transitions. [2021-10-13 00:00:46,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 711 transitions. [2021-10-13 00:00:46,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-13 00:00:46,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:46,115 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:46,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-10-13 00:00:46,115 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:46,116 INFO L82 PathProgramCache]: Analyzing trace with hash -726479694, now seen corresponding path program 1 times [2021-10-13 00:00:46,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:46,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061388669] [2021-10-13 00:00:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:46,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-13 00:00:46,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:46,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061388669] [2021-10-13 00:00:46,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061388669] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:46,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:46,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:46,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999849719] [2021-10-13 00:00:46,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:46,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:46,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,170 INFO L87 Difference]: Start difference. First operand 484 states and 711 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:46,211 INFO L93 Difference]: Finished difference Result 974 states and 1434 transitions. [2021-10-13 00:00:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:46,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-10-13 00:00:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:46,215 INFO L225 Difference]: With dead ends: 974 [2021-10-13 00:00:46,215 INFO L226 Difference]: Without dead ends: 511 [2021-10-13 00:00:46,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-10-13 00:00:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2021-10-13 00:00:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.4627450980392156) internal successors, (746), 510 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 746 transitions. [2021-10-13 00:00:46,233 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 746 transitions. Word has length 98 [2021-10-13 00:00:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:46,234 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 746 transitions. [2021-10-13 00:00:46,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 746 transitions. [2021-10-13 00:00:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-13 00:00:46,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:46,236 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:46,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-10-13 00:00:46,236 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash -699414092, now seen corresponding path program 1 times [2021-10-13 00:00:46,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:46,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318936542] [2021-10-13 00:00:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:46,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-10-13 00:00:46,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:46,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318936542] [2021-10-13 00:00:46,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318936542] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:46,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:46,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:46,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201422350] [2021-10-13 00:00:46,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:46,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,284 INFO L87 Difference]: Start difference. First operand 511 states and 746 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:46,316 INFO L93 Difference]: Finished difference Result 1003 states and 1470 transitions. [2021-10-13 00:00:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-10-13 00:00:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:46,319 INFO L225 Difference]: With dead ends: 1003 [2021-10-13 00:00:46,319 INFO L226 Difference]: Without dead ends: 513 [2021-10-13 00:00:46,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-10-13 00:00:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 513. [2021-10-13 00:00:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.4609375) internal successors, (748), 512 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 748 transitions. [2021-10-13 00:00:46,337 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 748 transitions. Word has length 98 [2021-10-13 00:00:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:46,338 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 748 transitions. [2021-10-13 00:00:46,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 748 transitions. [2021-10-13 00:00:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-13 00:00:46,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:46,340 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:46,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-10-13 00:00:46,340 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash 468915674, now seen corresponding path program 1 times [2021-10-13 00:00:46,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:46,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198260116] [2021-10-13 00:00:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:46,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 00:00:46,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:46,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198260116] [2021-10-13 00:00:46,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198260116] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:46,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:46,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:46,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058473145] [2021-10-13 00:00:46,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:46,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,422 INFO L87 Difference]: Start difference. First operand 513 states and 748 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:46,478 INFO L93 Difference]: Finished difference Result 1238 states and 1820 transitions. [2021-10-13 00:00:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-13 00:00:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:46,483 INFO L225 Difference]: With dead ends: 1238 [2021-10-13 00:00:46,483 INFO L226 Difference]: Without dead ends: 748 [2021-10-13 00:00:46,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-10-13 00:00:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2021-10-13 00:00:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 1.4711409395973154) internal successors, (1096), 745 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1096 transitions. [2021-10-13 00:00:46,509 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1096 transitions. Word has length 100 [2021-10-13 00:00:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:46,510 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1096 transitions. [2021-10-13 00:00:46,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1096 transitions. [2021-10-13 00:00:46,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-13 00:00:46,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:46,512 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:46,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-10-13 00:00:46,512 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash 34857145, now seen corresponding path program 1 times [2021-10-13 00:00:46,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:46,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757207721] [2021-10-13 00:00:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:46,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 00:00:46,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:46,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757207721] [2021-10-13 00:00:46,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757207721] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:46,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:46,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:46,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332579689] [2021-10-13 00:00:46,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:46,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,574 INFO L87 Difference]: Start difference. First operand 746 states and 1096 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:46,644 INFO L93 Difference]: Finished difference Result 1704 states and 2514 transitions. [2021-10-13 00:00:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-10-13 00:00:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:46,650 INFO L225 Difference]: With dead ends: 1704 [2021-10-13 00:00:46,651 INFO L226 Difference]: Without dead ends: 981 [2021-10-13 00:00:46,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-10-13 00:00:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 979. [2021-10-13 00:00:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.4621676891615543) internal successors, (1430), 978 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1430 transitions. [2021-10-13 00:00:46,685 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1430 transitions. Word has length 106 [2021-10-13 00:00:46,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:46,685 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 1430 transitions. [2021-10-13 00:00:46,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,685 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1430 transitions. [2021-10-13 00:00:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-13 00:00:46,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:46,688 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:46,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-10-13 00:00:46,689 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:46,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:46,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1774249839, now seen corresponding path program 1 times [2021-10-13 00:00:46,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:46,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476078186] [2021-10-13 00:00:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:46,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 00:00:46,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:46,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476078186] [2021-10-13 00:00:46,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476078186] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:46,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:46,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:46,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062174252] [2021-10-13 00:00:46,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:46,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,759 INFO L87 Difference]: Start difference. First operand 979 states and 1430 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:46,822 INFO L93 Difference]: Finished difference Result 2168 states and 3181 transitions. [2021-10-13 00:00:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:46,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-10-13 00:00:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:46,829 INFO L225 Difference]: With dead ends: 2168 [2021-10-13 00:00:46,829 INFO L226 Difference]: Without dead ends: 1212 [2021-10-13 00:00:46,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-10-13 00:00:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1212. [2021-10-13 00:00:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.4657308009909167) internal successors, (1775), 1211 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1775 transitions. [2021-10-13 00:00:46,891 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1775 transitions. Word has length 123 [2021-10-13 00:00:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:46,892 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1775 transitions. [2021-10-13 00:00:46,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1775 transitions. [2021-10-13 00:00:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-13 00:00:46,895 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:46,895 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:46,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-10-13 00:00:46,895 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:46,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:46,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1271906027, now seen corresponding path program 1 times [2021-10-13 00:00:46,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:46,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954615835] [2021-10-13 00:00:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:46,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-13 00:00:46,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:46,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954615835] [2021-10-13 00:00:46,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954615835] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:46,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:46,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:00:46,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767910860] [2021-10-13 00:00:46,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:00:46,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:46,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:00:46,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:46,977 INFO L87 Difference]: Start difference. First operand 1212 states and 1775 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:47,038 INFO L93 Difference]: Finished difference Result 1449 states and 2120 transitions. [2021-10-13 00:00:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:00:47,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-10-13 00:00:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:47,046 INFO L225 Difference]: With dead ends: 1449 [2021-10-13 00:00:47,046 INFO L226 Difference]: Without dead ends: 1447 [2021-10-13 00:00:47,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:00:47,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-10-13 00:00:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1445. [2021-10-13 00:00:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 1.4660664819944598) internal successors, (2117), 1444 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2117 transitions. [2021-10-13 00:00:47,095 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2117 transitions. Word has length 129 [2021-10-13 00:00:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:47,096 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 2117 transitions. [2021-10-13 00:00:47,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2117 transitions. [2021-10-13 00:00:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-13 00:00:47,099 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:47,100 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:47,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-10-13 00:00:47,100 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1035961974, now seen corresponding path program 1 times [2021-10-13 00:00:47,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:47,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904195056] [2021-10-13 00:00:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:47,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-10-13 00:00:47,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:47,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904195056] [2021-10-13 00:00:47,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904195056] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:00:47,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:00:47,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:00:47,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554065568] [2021-10-13 00:00:47,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:00:47,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:00:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:00:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:00:47,422 INFO L87 Difference]: Start difference. First operand 1445 states and 2117 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:51,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:00:51,090 INFO L93 Difference]: Finished difference Result 2887 states and 4230 transitions. [2021-10-13 00:00:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:00:51,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-10-13 00:00:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:00:51,099 INFO L225 Difference]: With dead ends: 2887 [2021-10-13 00:00:51,099 INFO L226 Difference]: Without dead ends: 1445 [2021-10-13 00:00:51,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:00:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-10-13 00:00:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1445. [2021-10-13 00:00:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 1.4653739612188366) internal successors, (2116), 1444 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2116 transitions. [2021-10-13 00:00:51,151 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2116 transitions. Word has length 166 [2021-10-13 00:00:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:00:51,151 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 2116 transitions. [2021-10-13 00:00:51,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:00:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2116 transitions. [2021-10-13 00:00:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-13 00:00:51,155 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:00:51,156 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:00:51,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-10-13 00:00:51,156 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:00:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:00:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1534397000, now seen corresponding path program 1 times [2021-10-13 00:00:51,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:00:51,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305537218] [2021-10-13 00:00:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:51,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:00:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 146 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 00:00:51,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:00:51,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305537218] [2021-10-13 00:00:51,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305537218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:00:51,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656550604] [2021-10-13 00:00:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:00:51,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:00:51,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:00:51,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:00:51,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:00:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:00:52,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-13 00:00:52,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:00:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2564 treesize of output 2561 [2021-10-13 00:00:52,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2606 treesize of output 2545 [2021-10-13 00:00:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:00:52,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:01:39,456 WARN L207 SmtUtils]: Spent 46.85 s on a formula simplification. DAG size of input: 229 DAG size of output: 74 [2021-10-13 00:01:39,457 INFO L354 Elim1Store]: treesize reduction 1604, result has 11.3 percent of original size [2021-10-13 00:01:39,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 12 new quantified variables, introduced 20 case distinctions, treesize of input 3059 treesize of output 2507 [2021-10-13 00:01:39,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-13 00:01:39,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:01:39,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-13 00:01:39,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639846246] [2021-10-13 00:01:39,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:01:39,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:01:39,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:01:39,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:01:39,551 INFO L87 Difference]: Start difference. First operand 1445 states and 2116 transitions. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:01:39,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:39,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-13 00:01:39,766 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4d372d91 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 00:01:39,771 INFO L168 Benchmark]: Toolchain (without parser) took 136988.47 ms. Allocated memory was 94.4 MB in the beginning and 169.9 MB in the end (delta: 75.5 MB). Free memory was 60.6 MB in the beginning and 85.9 MB in the end (delta: -25.3 MB). Peak memory consumption was 50.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:39,772 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 50.2 MB in the beginning and 50.2 MB in the end (delta: 28.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:01:39,772 INFO L168 Benchmark]: CACSL2BoogieTranslator took 855.88 ms. Allocated memory is still 94.4 MB. Free memory was 60.4 MB in the beginning and 48.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:39,772 INFO L168 Benchmark]: Boogie Procedure Inliner took 130.74 ms. Allocated memory is still 94.4 MB. Free memory was 48.7 MB in the beginning and 43.8 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:39,773 INFO L168 Benchmark]: Boogie Preprocessor took 182.08 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 43.8 MB in the beginning and 94.7 MB in the end (delta: -50.9 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:39,773 INFO L168 Benchmark]: RCFGBuilder took 3303.88 ms. Allocated memory is still 123.7 MB. Free memory was 94.7 MB in the beginning and 70.2 MB in the end (delta: 24.6 MB). Peak memory consumption was 50.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:39,773 INFO L168 Benchmark]: TraceAbstraction took 132507.76 ms. Allocated memory was 123.7 MB in the beginning and 169.9 MB in the end (delta: 46.1 MB). Free memory was 70.2 MB in the beginning and 85.9 MB in the end (delta: -15.7 MB). Peak memory consumption was 30.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:01:39,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 50.2 MB in the beginning and 50.2 MB in the end (delta: 28.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 855.88 ms. Allocated memory is still 94.4 MB. Free memory was 60.4 MB in the beginning and 48.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 130.74 ms. Allocated memory is still 94.4 MB. Free memory was 48.7 MB in the beginning and 43.8 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 182.08 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 43.8 MB in the beginning and 94.7 MB in the end (delta: -50.9 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3303.88 ms. Allocated memory is still 123.7 MB. Free memory was 94.7 MB in the beginning and 70.2 MB in the end (delta: 24.6 MB). Peak memory consumption was 50.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 132507.76 ms. Allocated memory was 123.7 MB in the beginning and 169.9 MB in the end (delta: 46.1 MB). Free memory was 70.2 MB in the beginning and 85.9 MB in the end (delta: -15.7 MB). Peak memory consumption was 30.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4d372d91 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4d372d91: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 00:01:39,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:01:42,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:01:42,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:01:42,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:01:42,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:01:42,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:01:42,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:01:42,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:01:42,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:01:42,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:01:42,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:01:42,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:01:42,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:01:42,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:01:42,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:01:42,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:01:42,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:01:42,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:01:42,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:01:42,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:01:42,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:01:42,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:01:42,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:01:42,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:01:42,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:01:42,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:01:42,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:01:42,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:01:42,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:01:42,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:01:42,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:01:42,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:01:42,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:01:42,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:01:42,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:01:42,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:01:42,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:01:42,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:01:42,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:01:42,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:01:42,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:01:42,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-13 00:01:42,565 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:01:42,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:01:42,566 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:01:42,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:01:42,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:01:42,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:01:42,569 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:01:42,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:01:42,570 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:01:42,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:01:42,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:01:42,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:01:42,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:01:42,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:01:42,572 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 00:01:42,573 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 00:01:42,573 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:01:42,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:01:42,573 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:01:42,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:01:42,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:01:42,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:01:42,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:01:42,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:01:42,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:01:42,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:01:42,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:01:42,576 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 00:01:42,576 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 00:01:42,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:01:42,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:01:42,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 00:01:42,578 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46079a7f9ccd5156b224e35207d03a9ecc6f7ef0 [2021-10-13 00:01:42,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:01:43,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:01:43,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:01:43,034 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:01:43,035 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:01:43,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c [2021-10-13 00:01:43,115 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/data/6efb28c70/c9b2529c1600471a852ea3596b3190d1/FLAG4ea7a8781 [2021-10-13 00:01:43,796 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:01:43,797 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c [2021-10-13 00:01:43,838 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/data/6efb28c70/c9b2529c1600471a852ea3596b3190d1/FLAG4ea7a8781 [2021-10-13 00:01:44,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/data/6efb28c70/c9b2529c1600471a852ea3596b3190d1 [2021-10-13 00:01:44,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:01:44,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:01:44,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:01:44,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:01:44,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:01:44,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:44,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0b151f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44, skipping insertion in model container [2021-10-13 00:01:44,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:44,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:01:44,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:01:44,540 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c[73891,73904] [2021-10-13 00:01:44,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:01:44,593 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:01:44,741 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-2.c[73891,73904] [2021-10-13 00:01:44,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:01:44,771 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:01:44,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44 WrapperNode [2021-10-13 00:01:44,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:01:44,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:01:44,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:01:44,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:01:44,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:44,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:44,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:01:44,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:01:44,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:01:44,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:01:44,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:44,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:44,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:44,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:45,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:45,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:45,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:45,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:01:45,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:01:45,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:01:45,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:01:45,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (1/1) ... [2021-10-13 00:01:45,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:01:45,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:01:45,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:01:45,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:01:45,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 00:01:45,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:01:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:01:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 00:01:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:01:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:01:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:01:45,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:01:45,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 00:01:45,303 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 00:01:49,683 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-13 00:01:49,683 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-13 00:01:49,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:01:49,693 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 00:01:49,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:01:49 BoogieIcfgContainer [2021-10-13 00:01:49,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:01:49,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:01:49,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:01:49,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:01:49,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:01:44" (1/3) ... [2021-10-13 00:01:49,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e685315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:01:49, skipping insertion in model container [2021-10-13 00:01:49,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:01:44" (2/3) ... [2021-10-13 00:01:49,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e685315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:01:49, skipping insertion in model container [2021-10-13 00:01:49,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:01:49" (3/3) ... [2021-10-13 00:01:49,704 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-2.c [2021-10-13 00:01:49,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:01:49,710 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:01:49,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:01:49,765 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:01:49,766 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:01:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:01:49,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:49,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:49,794 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:49,799 INFO L82 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-10-13 00:01:49,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:01:49,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210282075] [2021-10-13 00:01:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:49,814 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:01:49,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:01:49,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:01:49,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 00:01:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:01:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:50,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:01:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:50,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:01:50,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210282075] [2021-10-13 00:01:50,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210282075] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:50,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:50,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 00:01:50,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749813451] [2021-10-13 00:01:50,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:50,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:01:50,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:50,866 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:51,164 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-10-13 00:01:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:51,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-13 00:01:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:51,192 INFO L225 Difference]: With dead ends: 566 [2021-10-13 00:01:51,193 INFO L226 Difference]: Without dead ends: 387 [2021-10-13 00:01:51,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-10-13 00:01:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-10-13 00:01:51,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-10-13 00:01:51,272 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-10-13 00:01:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:51,273 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-10-13 00:01:51,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-10-13 00:01:51,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 00:01:51,279 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:51,279 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:51,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:51,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:01:51,500 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:51,501 INFO L82 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-10-13 00:01:51,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:01:51,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249667382] [2021-10-13 00:01:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:51,503 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:01:51,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:01:51,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:01:51,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 00:01:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:51,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:01:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:52,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:01:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:01:52,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:01:52,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249667382] [2021-10-13 00:01:52,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249667382] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:52,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:52,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 00:01:52,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125563502] [2021-10-13 00:01:52,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:52,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:01:52,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:52,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:52,447 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:52,699 INFO L93 Difference]: Finished difference Result 879 states and 1353 transitions. [2021-10-13 00:01:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:52,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-10-13 00:01:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:52,705 INFO L225 Difference]: With dead ends: 879 [2021-10-13 00:01:52,705 INFO L226 Difference]: Without dead ends: 628 [2021-10-13 00:01:52,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-10-13 00:01:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 626. [2021-10-13 00:01:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 1.52) internal successors, (950), 625 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 950 transitions. [2021-10-13 00:01:52,775 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 950 transitions. Word has length 60 [2021-10-13 00:01:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:52,777 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 950 transitions. [2021-10-13 00:01:52,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 950 transitions. [2021-10-13 00:01:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-13 00:01:52,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:52,794 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:52,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:01:53,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:01:53,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1749353389, now seen corresponding path program 1 times [2021-10-13 00:01:53,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:01:53,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418330194] [2021-10-13 00:01:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:53,019 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:01:53,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:01:53,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:01:53,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 00:01:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:53,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:01:53,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:01:53,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:01:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:01:54,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:01:54,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418330194] [2021-10-13 00:01:54,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418330194] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:54,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:54,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 00:01:54,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915796835] [2021-10-13 00:01:54,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:01:54,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:01:54,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:01:54,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:01:54,330 INFO L87 Difference]: Start difference. First operand 626 states and 950 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:54,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:54,507 INFO L93 Difference]: Finished difference Result 1238 states and 1888 transitions. [2021-10-13 00:01:54,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:01:54,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-10-13 00:01:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:54,514 INFO L225 Difference]: With dead ends: 1238 [2021-10-13 00:01:54,514 INFO L226 Difference]: Without dead ends: 746 [2021-10-13 00:01:54,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:01:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-10-13 00:01:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 746. [2021-10-13 00:01:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 1.516778523489933) internal successors, (1130), 745 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1130 transitions. [2021-10-13 00:01:54,578 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1130 transitions. Word has length 119 [2021-10-13 00:01:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:54,578 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1130 transitions. [2021-10-13 00:01:54,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1130 transitions. [2021-10-13 00:01:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-13 00:01:54,586 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:54,586 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:54,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 00:01:54,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:01:54,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash 433077792, now seen corresponding path program 1 times [2021-10-13 00:01:54,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:01:54,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876694135] [2021-10-13 00:01:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:54,802 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:01:54,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:01:54,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:01:54,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 00:01:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:55,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:01:55,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 00:01:55,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:01:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 00:01:56,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:01:56,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876694135] [2021-10-13 00:01:56,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876694135] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:56,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:56,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 00:01:56,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125842746] [2021-10-13 00:01:56,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:01:56,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:01:56,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:01:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:56,303 INFO L87 Difference]: Start difference. First operand 746 states and 1130 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:01:56,585 INFO L93 Difference]: Finished difference Result 1605 states and 2443 transitions. [2021-10-13 00:01:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:01:56,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-10-13 00:01:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:01:56,593 INFO L225 Difference]: With dead ends: 1605 [2021-10-13 00:01:56,594 INFO L226 Difference]: Without dead ends: 993 [2021-10-13 00:01:56,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:01:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-10-13 00:01:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 993. [2021-10-13 00:01:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 1.5141129032258065) internal successors, (1502), 992 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1502 transitions. [2021-10-13 00:01:56,638 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1502 transitions. Word has length 143 [2021-10-13 00:01:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:01:56,640 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1502 transitions. [2021-10-13 00:01:56,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:01:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1502 transitions. [2021-10-13 00:01:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-13 00:01:56,646 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:01:56,646 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:01:56,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-13 00:01:56,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:01:56,859 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:01:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:01:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1035961974, now seen corresponding path program 1 times [2021-10-13 00:01:56,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:01:56,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982321678] [2021-10-13 00:01:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:01:56,861 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:01:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:01:56,862 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:01:56,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 00:01:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:01:57,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:01:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:01:57,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:01:57,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:01:57,768 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-10-13 00:01:57,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 22 [2021-10-13 00:01:57,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:01:57,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:01:57,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:01:57,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-10-13 00:01:57,914 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-13 00:01:57,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-10-13 00:01:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:01:57,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-13 00:01:57,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-13 00:01:57,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 00:01:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-10-13 00:01:58,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:01:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-10-13 00:01:59,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:01:59,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982321678] [2021-10-13 00:01:59,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982321678] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:01:59,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:01:59,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 00:01:59,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94024937] [2021-10-13 00:01:59,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:01:59,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:01:59,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:01:59,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:01:59,659 INFO L87 Difference]: Start difference. First operand 993 states and 1502 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:02:13,273 INFO L93 Difference]: Finished difference Result 1983 states and 3000 transitions. [2021-10-13 00:02:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:02:13,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-10-13 00:02:13,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:02:13,282 INFO L225 Difference]: With dead ends: 1983 [2021-10-13 00:02:13,283 INFO L226 Difference]: Without dead ends: 993 [2021-10-13 00:02:13,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 323 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:02:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-10-13 00:02:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 993. [2021-10-13 00:02:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 1.5131048387096775) internal successors, (1501), 992 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1501 transitions. [2021-10-13 00:02:13,330 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1501 transitions. Word has length 166 [2021-10-13 00:02:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:02:13,330 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1501 transitions. [2021-10-13 00:02:13,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:02:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1501 transitions. [2021-10-13 00:02:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-13 00:02:13,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:02:13,336 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:02:13,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:02:13,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:02:13,553 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:02:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:02:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1534397000, now seen corresponding path program 1 times [2021-10-13 00:02:13,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:02:13,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999684767] [2021-10-13 00:02:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:02:13,554 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:02:13,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:02:13,556 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:02:13,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 00:02:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:02:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-13 00:02:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:03:59,710 WARN L207 SmtUtils]: Spent 1.73 m on a formula simplification. DAG size of input: 66 DAG size of output: 15 [2021-10-13 00:03:59,712 INFO L354 Elim1Store]: treesize reduction 201, result has 13.7 percent of original size [2021-10-13 00:03:59,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 2079 treesize of output 2089 [2021-10-13 00:03:59,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2071 treesize of output 2068 [2021-10-13 00:03:59,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2590 treesize of output 2414 [2021-10-13 00:03:59,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:03:59,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2234 treesize of output 2034 [2021-10-13 00:04:23,421 WARN L207 SmtUtils]: Spent 23.46 s on a formula simplification. DAG size of input: 31 DAG size of output: 9 [2021-10-13 00:04:23,421 INFO L354 Elim1Store]: treesize reduction 58, result has 15.9 percent of original size [2021-10-13 00:04:23,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 2337 treesize of output 2172 [2021-10-13 00:04:23,464 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:04:23,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 2276 treesize of output 2169 [2021-10-13 00:04:23,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2247 treesize of output 2143 [2021-10-13 00:05:35,610 WARN L207 SmtUtils]: Spent 1.20 m on a formula simplification. DAG size of input: 92 DAG size of output: 29 [2021-10-13 00:05:35,611 INFO L354 Elim1Store]: treesize reduction 554, result has 7.8 percent of original size [2021-10-13 00:05:35,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 2240 treesize of output 2184 [2021-10-13 00:05:35,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 3566 treesize of output 3104 [2021-10-13 00:05:35,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:05:35,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2348 treesize of output 2283 [2021-10-13 00:05:38,527 INFO L354 Elim1Store]: treesize reduction 130, result has 13.9 percent of original size [2021-10-13 00:05:38,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 2256 treesize of output 2170 [2021-10-13 00:05:38,599 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 00:05:38,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2173 treesize of output 2163 [2021-10-13 00:05:38,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2152 treesize of output 2140 [2021-10-13 00:05:38,727 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 00:05:38,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2145 treesize of output 2123 [2021-10-13 00:05:38,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2124 treesize of output 2112 [2021-10-13 00:05:38,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:05:38,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999684767] [2021-10-13 00:05:38,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-13 00:05:38,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [110395816] [2021-10-13 00:05:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:38,872 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 00:05:38,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/cvc4 [2021-10-13 00:05:38,876 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 00:05:38,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 00:05:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:53,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 00:05:53,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@78d0a269 [2021-10-13 00:05:53,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645905812] [2021-10-13 00:05:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:05:53,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:05:53,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:05:53,570 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:05:53,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:05:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:05:54,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-13 00:05:54,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@78d0a269 [2021-10-13 00:05:54,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:05:54,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 00:05:54,404 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-13 00:05:54,404 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 00:05:54,412 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:05:54,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-13 00:05:54,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 00:05:54,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-13 00:05:55,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt [2021-10-13 00:05:55,021 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:05:55,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:05:55 BoogieIcfgContainer [2021-10-13 00:05:55,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:05:55,065 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:05:55,066 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:05:55,066 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:05:55,066 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:01:49" (3/4) ... [2021-10-13 00:05:55,069 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:05:55,069 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:05:55,070 INFO L168 Benchmark]: Toolchain (without parser) took 251059.79 ms. Allocated memory was 58.7 MB in the beginning and 104.9 MB in the end (delta: 46.1 MB). Free memory was 36.2 MB in the beginning and 43.1 MB in the end (delta: -6.9 MB). Peak memory consumption was 44.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:55,070 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 58.7 MB. Free memory is still 38.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:05:55,071 INFO L168 Benchmark]: CACSL2BoogieTranslator took 760.02 ms. Allocated memory is still 58.7 MB. Free memory was 36.0 MB in the beginning and 31.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:55,071 INFO L168 Benchmark]: Boogie Procedure Inliner took 128.95 ms. Allocated memory is still 58.7 MB. Free memory was 31.9 MB in the beginning and 27.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:55,072 INFO L168 Benchmark]: Boogie Preprocessor took 135.82 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 27.3 MB in the beginning and 53.0 MB in the end (delta: -25.7 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:55,072 INFO L168 Benchmark]: RCFGBuilder took 4656.18 ms. Allocated memory is still 77.6 MB. Free memory was 53.0 MB in the beginning and 42.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 29.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:55,073 INFO L168 Benchmark]: TraceAbstraction took 245367.53 ms. Allocated memory was 77.6 MB in the beginning and 104.9 MB in the end (delta: 27.3 MB). Free memory was 42.4 MB in the beginning and 43.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:55,073 INFO L168 Benchmark]: Witness Printer took 3.90 ms. Allocated memory is still 104.9 MB. Free memory was 43.9 MB in the beginning and 43.1 MB in the end (delta: 797.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:05:55,075 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 58.7 MB. Free memory is still 38.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 760.02 ms. Allocated memory is still 58.7 MB. Free memory was 36.0 MB in the beginning and 31.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 128.95 ms. Allocated memory is still 58.7 MB. Free memory was 31.9 MB in the beginning and 27.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 135.82 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 27.3 MB in the beginning and 53.0 MB in the end (delta: -25.7 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4656.18 ms. Allocated memory is still 77.6 MB. Free memory was 53.0 MB in the beginning and 42.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 29.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 245367.53 ms. Allocated memory was 77.6 MB in the beginning and 104.9 MB in the end (delta: 27.3 MB). Free memory was 42.4 MB in the beginning and 43.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.90 ms. Allocated memory is still 104.9 MB. Free memory was 43.9 MB in the beginning and 43.1 MB in the end (delta: 797.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1747]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1044] static int init = 1; [L1045] static SSL_METHOD SSLv3_server_data ; [L1067] SSL *s ; [L1068] int tmp ; [L1072] s = malloc(sizeof(SSL)) [L1073] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1074] s->ctx = malloc(sizeof(SSL_CTX)) [L1075] s->session = malloc(sizeof(SSL_SESSION)) [L1077] s->info_callback = (void (*) ()) __VERIFIER_nondet_ulong() [L1078] s->options = __VERIFIER_nondet_ulong() [L1079] s->verify_mode = __VERIFIER_nondet_int() [L1080] EXPR s->session [L1080] (s->session)->peer = (struct x509_st*) __VERIFIER_nondet_ulong() [L1081] EXPR s->s3 [L1081] (s->s3)->tmp.cert_request = __VERIFIER_nondet_int() [L1082] EXPR s->s3 [L1082] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1083] EXPR s->s3 [L1083] EXPR (s->s3)->tmp.new_cipher [L1083] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1084] EXPR s->s3 [L1084] EXPR (s->s3)->tmp.new_cipher [L1084] ((s->s3)->tmp.new_cipher)->algo_strength = __VERIFIER_nondet_ulong() [L1085] COND FALSE !(__VERIFIER_nondet_int()) [L1091] s->cert = malloc(sizeof(struct cert_st)) [L1092] EXPR s->cert [L1092] (s->cert)->pkeys[0].privatekey = (struct evp_pkey_st*) __VERIFIER_nondet_ulong() [L1101] BUF_MEM *buf ; [L1102] unsigned long l ; [L1103] unsigned long Time ; [L1104] unsigned long tmp ; [L1105] void (*cb)() ; [L1106] long num1 ; [L1107] int ret ; [L1108] int new_state ; [L1109] int state ; [L1110] int skip ; [L1111] int got_new_session ; [L1112] int tmp___1 = __VERIFIER_nondet_int() ; [L1113] int tmp___2 = __VERIFIER_nondet_int() ; [L1114] int tmp___3 = __VERIFIER_nondet_int() ; [L1115] int tmp___4 = __VERIFIER_nondet_int() ; [L1116] int tmp___5 = __VERIFIER_nondet_int() ; [L1117] int tmp___6 = __VERIFIER_nondet_int() ; [L1118] int tmp___7 ; [L1119] long tmp___8 = __VERIFIER_nondet_long() ; [L1120] int tmp___9 = __VERIFIER_nondet_int() ; [L1121] int tmp___10 = __VERIFIER_nondet_int() ; [L1122] int blastFlag ; [L1126] s->state = 8464 [L1127] blastFlag = 0 [L1128] s->hit=__VERIFIER_nondet_int () [L1129] s->state = 8464 [L1130] tmp = __VERIFIER_nondet_int() [L1131] Time = tmp [L1132] cb = (void (*)())((void *)0) [L1133] ret = -1 [L1134] skip = 0 [L1135] got_new_session = 0 [L1136] EXPR s->info_callback [L1136] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1137] EXPR s->info_callback [L1137] cb = s->info_callback [L1141] EXPR s->in_handshake [L1141] s->in_handshake += 1 [L1142] COND FALSE !(tmp___1 & 12288) [L1151] EXPR s->cert [L1151] COND FALSE !((unsigned long )s->cert == (unsigned long )((void *)0)) [L1157] COND TRUE 1 [L1159] EXPR s->state [L1159] state = s->state [L1160] EXPR s->state [L1160] COND FALSE !(s->state == 12292) [L1163] EXPR s->state [L1163] COND FALSE !(s->state == 16384) [L1166] EXPR s->state [L1166] COND FALSE !(s->state == 8192) [L1169] EXPR s->state [L1169] COND FALSE !(s->state == 24576) [L1172] EXPR s->state [L1172] COND FALSE !(s->state == 8195) [L1175] EXPR s->state [L1175] COND FALSE !(s->state == 8480) [L1178] EXPR s->state [L1178] COND FALSE !(s->state == 8481) [L1181] EXPR s->state [L1181] COND FALSE !(s->state == 8482) [L1184] EXPR s->state [L1184] COND TRUE s->state == 8464 [L1344] s->shutdown = 0 [L1345] ret = __VERIFIER_nondet_int() [L1346] COND TRUE blastFlag == 0 [L1347] blastFlag = 1 [L1351] COND FALSE !(ret <= 0) [L1356] got_new_session = 1 [L1357] s->state = 8496 [L1358] s->init_num = 0 [L1706] EXPR s->s3 [L1706] EXPR (s->s3)->tmp.reuse_message [L1706] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1735] skip = 0 [L1157] COND TRUE 1 [L1159] EXPR s->state [L1159] state = s->state [L1160] EXPR s->state [L1160] COND FALSE !(s->state == 12292) [L1163] EXPR s->state [L1163] COND FALSE !(s->state == 16384) [L1166] EXPR s->state [L1166] COND FALSE !(s->state == 8192) [L1169] EXPR s->state [L1169] COND FALSE !(s->state == 24576) [L1172] EXPR s->state [L1172] COND FALSE !(s->state == 8195) [L1175] EXPR s->state [L1175] COND FALSE !(s->state == 8480) [L1178] EXPR s->state [L1178] COND FALSE !(s->state == 8481) [L1181] EXPR s->state [L1181] COND FALSE !(s->state == 8482) [L1184] EXPR s->state [L1184] COND FALSE !(s->state == 8464) [L1187] EXPR s->state [L1187] COND FALSE !(s->state == 8465) [L1190] EXPR s->state [L1190] COND FALSE !(s->state == 8466) [L1193] EXPR s->state [L1193] COND TRUE s->state == 8496 [L1362] ret = __VERIFIER_nondet_int() [L1363] COND TRUE blastFlag == 1 [L1364] blastFlag = 2 [L1368] COND FALSE !(ret <= 0) [L1373] s->hit [L1373] COND TRUE s->hit [L1374] s->state = 8656 [L1378] s->init_num = 0 [L1706] EXPR s->s3 [L1706] EXPR (s->s3)->tmp.reuse_message [L1706] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1735] skip = 0 [L1157] COND TRUE 1 [L1159] EXPR s->state [L1159] state = s->state [L1160] EXPR s->state [L1160] COND FALSE !(s->state == 12292) [L1163] EXPR s->state [L1163] COND FALSE !(s->state == 16384) [L1166] EXPR s->state [L1166] COND FALSE !(s->state == 8192) [L1169] EXPR s->state [L1169] COND FALSE !(s->state == 24576) [L1172] EXPR s->state [L1172] COND FALSE !(s->state == 8195) [L1175] EXPR s->state [L1175] COND FALSE !(s->state == 8480) [L1178] EXPR s->state [L1178] COND FALSE !(s->state == 8481) [L1181] EXPR s->state [L1181] COND FALSE !(s->state == 8482) [L1184] EXPR s->state [L1184] COND FALSE !(s->state == 8464) [L1187] EXPR s->state [L1187] COND FALSE !(s->state == 8465) [L1190] EXPR s->state [L1190] COND FALSE !(s->state == 8466) [L1193] EXPR s->state [L1193] COND FALSE !(s->state == 8496) [L1196] EXPR s->state [L1196] COND FALSE !(s->state == 8497) [L1199] EXPR s->state [L1199] COND FALSE !(s->state == 8512) [L1202] EXPR s->state [L1202] COND FALSE !(s->state == 8513) [L1205] EXPR s->state [L1205] COND FALSE !(s->state == 8528) [L1208] EXPR s->state [L1208] COND FALSE !(s->state == 8529) [L1211] EXPR s->state [L1211] COND FALSE !(s->state == 8544) [L1214] EXPR s->state [L1214] COND FALSE !(s->state == 8545) [L1217] EXPR s->state [L1217] COND FALSE !(s->state == 8560) [L1220] EXPR s->state [L1220] COND FALSE !(s->state == 8561) [L1223] EXPR s->state [L1223] COND FALSE !(s->state == 8448) [L1226] EXPR s->state [L1226] COND FALSE !(s->state == 8576) [L1229] EXPR s->state [L1229] COND FALSE !(s->state == 8577) [L1232] EXPR s->state [L1232] COND FALSE !(s->state == 8592) [L1235] EXPR s->state [L1235] COND FALSE !(s->state == 8593) [L1238] EXPR s->state [L1238] COND FALSE !(s->state == 8608) [L1241] EXPR s->state [L1241] COND FALSE !(s->state == 8609) [L1244] EXPR s->state [L1244] COND FALSE !(s->state == 8640) [L1247] EXPR s->state [L1247] COND FALSE !(s->state == 8641) [L1250] EXPR s->state [L1250] COND TRUE s->state == 8656 [L1591] EXPR s->session [L1591] EXPR s->s3 [L1591] EXPR (s->s3)->tmp.new_cipher [L1591] (s->session)->cipher = (s->s3)->tmp.new_cipher [L1592] COND FALSE !(! tmp___9) [L1598] ret = __VERIFIER_nondet_int() [L1599] COND TRUE blastFlag == 2 [L1600] blastFlag = 3 [L1612] COND FALSE !(ret <= 0) [L1617] s->state = 8672 [L1618] s->init_num = 0 [L1619] COND FALSE !(! tmp___10) [L1706] EXPR s->s3 [L1706] EXPR (s->s3)->tmp.reuse_message [L1706] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1735] skip = 0 [L1157] COND TRUE 1 [L1159] EXPR s->state [L1159] state = s->state [L1160] EXPR s->state [L1160] COND FALSE !(s->state == 12292) [L1163] EXPR s->state [L1163] COND FALSE !(s->state == 16384) [L1166] EXPR s->state [L1166] COND FALSE !(s->state == 8192) [L1169] EXPR s->state [L1169] COND FALSE !(s->state == 24576) [L1172] EXPR s->state [L1172] COND FALSE !(s->state == 8195) [L1175] EXPR s->state [L1175] COND FALSE !(s->state == 8480) [L1178] EXPR s->state [L1178] COND FALSE !(s->state == 8481) [L1181] EXPR s->state [L1181] COND FALSE !(s->state == 8482) [L1184] EXPR s->state [L1184] COND FALSE !(s->state == 8464) [L1187] EXPR s->state [L1187] COND FALSE !(s->state == 8465) [L1190] EXPR s->state [L1190] COND FALSE !(s->state == 8466) [L1193] EXPR s->state [L1193] COND FALSE !(s->state == 8496) [L1196] EXPR s->state [L1196] COND FALSE !(s->state == 8497) [L1199] EXPR s->state [L1199] COND FALSE !(s->state == 8512) [L1202] EXPR s->state [L1202] COND FALSE !(s->state == 8513) [L1205] EXPR s->state [L1205] COND FALSE !(s->state == 8528) [L1208] EXPR s->state [L1208] COND FALSE !(s->state == 8529) [L1211] EXPR s->state [L1211] COND FALSE !(s->state == 8544) [L1214] EXPR s->state [L1214] COND FALSE !(s->state == 8545) [L1217] EXPR s->state [L1217] COND FALSE !(s->state == 8560) [L1220] EXPR s->state [L1220] COND FALSE !(s->state == 8561) [L1223] EXPR s->state [L1223] COND FALSE !(s->state == 8448) [L1226] EXPR s->state [L1226] COND FALSE !(s->state == 8576) [L1229] EXPR s->state [L1229] COND FALSE !(s->state == 8577) [L1232] EXPR s->state [L1232] COND FALSE !(s->state == 8592) [L1235] EXPR s->state [L1235] COND FALSE !(s->state == 8593) [L1238] EXPR s->state [L1238] COND FALSE !(s->state == 8608) [L1241] EXPR s->state [L1241] COND FALSE !(s->state == 8609) [L1244] EXPR s->state [L1244] COND FALSE !(s->state == 8640) [L1247] EXPR s->state [L1247] COND FALSE !(s->state == 8641) [L1250] EXPR s->state [L1250] COND FALSE !(s->state == 8656) [L1253] EXPR s->state [L1253] COND FALSE !(s->state == 8657) [L1256] EXPR s->state [L1256] COND TRUE s->state == 8672 [L1628] ret = __VERIFIER_nondet_int() [L1629] COND TRUE blastFlag == 3 [L1630] blastFlag = 4 [L1634] COND FALSE !(ret <= 0) [L1639] s->state = 8448 [L1640] s->hit [L1640] COND TRUE s->hit [L1641] EXPR s->s3 [L1641] (s->s3)->tmp.next_state = 8640 [L1645] s->init_num = 0 [L1706] EXPR s->s3 [L1706] EXPR (s->s3)->tmp.reuse_message [L1706] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1735] skip = 0 [L1157] COND TRUE 1 [L1159] EXPR s->state [L1159] state = s->state [L1160] EXPR s->state [L1160] COND FALSE !(s->state == 12292) [L1163] EXPR s->state [L1163] COND FALSE !(s->state == 16384) [L1166] EXPR s->state [L1166] COND FALSE !(s->state == 8192) [L1169] EXPR s->state [L1169] COND FALSE !(s->state == 24576) [L1172] EXPR s->state [L1172] COND FALSE !(s->state == 8195) [L1175] EXPR s->state [L1175] COND FALSE !(s->state == 8480) [L1178] EXPR s->state [L1178] COND FALSE !(s->state == 8481) [L1181] EXPR s->state [L1181] COND FALSE !(s->state == 8482) [L1184] EXPR s->state [L1184] COND FALSE !(s->state == 8464) [L1187] EXPR s->state [L1187] COND FALSE !(s->state == 8465) [L1190] EXPR s->state [L1190] COND FALSE !(s->state == 8466) [L1193] EXPR s->state [L1193] COND FALSE !(s->state == 8496) [L1196] EXPR s->state [L1196] COND FALSE !(s->state == 8497) [L1199] EXPR s->state [L1199] COND FALSE !(s->state == 8512) [L1202] EXPR s->state [L1202] COND FALSE !(s->state == 8513) [L1205] EXPR s->state [L1205] COND FALSE !(s->state == 8528) [L1208] EXPR s->state [L1208] COND FALSE !(s->state == 8529) [L1211] EXPR s->state [L1211] COND FALSE !(s->state == 8544) [L1214] EXPR s->state [L1214] COND FALSE !(s->state == 8545) [L1217] EXPR s->state [L1217] COND FALSE !(s->state == 8560) [L1220] EXPR s->state [L1220] COND FALSE !(s->state == 8561) [L1223] EXPR s->state [L1223] COND FALSE !(s->state == 8448) [L1226] EXPR s->state [L1226] COND FALSE !(s->state == 8576) [L1229] EXPR s->state [L1229] COND FALSE !(s->state == 8577) [L1232] EXPR s->state [L1232] COND FALSE !(s->state == 8592) [L1235] EXPR s->state [L1235] COND FALSE !(s->state == 8593) [L1238] EXPR s->state [L1238] COND FALSE !(s->state == 8608) [L1241] EXPR s->state [L1241] COND FALSE !(s->state == 8609) [L1244] EXPR s->state [L1244] COND TRUE s->state == 8640 [L1571] ret = __VERIFIER_nondet_int() [L1572] COND TRUE blastFlag == 4 [L1747] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 150 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 245262.8ms, OverallIterations: 6, TraceHistogramMax: 5, EmptinessCheckTime: 50.4ms, AutomataDifference: 14723.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1545 SDtfs, 1147 SDslu, 2282 SDs, 0 SdLazy, 517 SolverSat, 73 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 13585.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1042 GetRequests, 1026 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 398.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=993occurred in iteration=4, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 277.7ms AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 258.7ms SsaConstructionTime, 876.6ms SatisfiabilityAnalysisTime, 5700.8ms InterpolantComputationTime, 525 NumberOfCodeBlocks, 525 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 1040 ConstructedInterpolants, 1 QuantifiedInterpolants, 1979 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1459 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 912/912 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 00:05:55,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3fa6d4c-4a30-42ab-932a-f73d72b1e55c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...